Improvement in metal-drilling machines



NIT

CLAUS VAN HAAGEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND ANTHONY VAN IIAAGEN, OF SAME PLAGE.

IMPROVEMENT IN METAL-DRILLING ACHINES.

Specification forming part of Letters Patent No. 159,4S l, dated February 2, 1e'75; application filed June 1, 1874. Y

` certain Improvements in Drilling-Machines,

of which the following is a vspeeication Myinvention relates to portable drilling-machines; and has for its objects the ready and secure attachment of the drill-stand to any desired fixed objects, the easy adjustment of the drillspindle to any position which circumstances may require, and the simple construetion of mechanism for rotating and feeding the said drill-spindle. TheseobjectsIattain in the manner which I will now proceed to describe, reference being had to the accompanying drawing, in which- Figure l is a side view, partly in section, of my improved portable drilling-machine; Fig. 2, a sectional plan on the line l 2, Fig. 1 Fig. 3, a vertical section on the line 3 4, Fig. 1 5 Fig. 4, asectional plan on the line56, Fig. 3, and Figs. 5 and 6 detached perspective views of parts of the mechanism.

The frame or stand of the drilling-machine consists of a cylindrical post. A, having afoot or base, a, the post being embraced by a collar, B, which is split at the rear, as shown in Fig. 2, and the severed portions of which are Yconnected together by a bolt, b, so that, on tightening the latter, the saidcollar will be securely clamped to the post. To a lug in front of the collar is hinged a clamping-plate, a', slotted lon gitudinally to receive a bolt, d, which also passes through a longitudinal slot in the foot a. In securing the stand to any object, the collar B should be vertically adj usted until the plate a', when in a horizontal position, is at a distance from the foot a equal, or nearly so, to the thickness of the object to which the stand has to be clamped, so that,when adjusted to this object, and the plate a is tightened by the bolt d, the said plate may bear uniformly on the surface, and thus insure a firm hold on the said object. The clampingcollar B affords every facility for this vertical adjustment of the clamping-plate a', and also permits this plate to be moved laterally out of the way whenever circumstances demand the vbolting of the foot to any object. 'Io the post is also adapted a clamping-disk, D, (best ob-V served in the perspective view in Fig. 6,) the portion c of this disk being severed,-so that, by means of a bolt, it may be made to gripe the post by tightening the nut 1,011 loosening which, however, the disk may be adjusted to any desired position on the said post. disk D has an undercut annular groove for the reception of the heads of the bolts f f', which pass through the disk E, the said bolt-heads being free to traverse this groove. This disk E has a central circular projection, i', adapted to a central opening in the disk D, so that when the two are iitted together the disk E can be turned to any desired position onv the disk D', but it is incapable of any other independent movement. On the disk E, a front view of which appears in Fig. 1, is formed a collar or clamp, severed, in the same manner as those heretofore described, so that it can be secured to the tubular rod F by tightening the bolt f or may be released by loosening the bolt, thereby permitting the said rod to be adjusted to any desired position longitudinally.

It may be observed that the bolt f serves to secure the two disks E and D together, and that the bolt f serves the same purpose, and also to clamp the disk E to the above-mentioned tubular bar F, which can be moved in either of the two vertical planes, at right angles to each other, to any desired position, may be turned laterally on the stand, and can be adj usted vertically on the same. In other words, the two disks E and D, with their clampingcollars, constitute a species of universal joint for connecting the post of the stand to the tubular bar F.

It has been usual heretofore in forming undercut grooves for the reception ofbolt-headssuch, for instance, as the annular groove g in the disk D--to cut away the metal at one point, so as to permit the introduction and Withdrawal of the said bolt-heads. In the present instance, however', one of the bolts, f', is relied on to clamp the disk E to the tubular bar F, as above described; and, if a portion of the metal were cut away, the head of the boltf might, under some circumstances, be brought to a position opposite such cut away portion, in which case it would yield, and release the tubular bar F. To prevent this, I adapt a rEhe ii isf-,431

hanged plug7 s, Figs. 6 and 7 to the cut portion of the groove, and thus eifeetuellyy retain the bolt-heads under all circumstances.

To one end of the bar F is secured a casing,

H, curry-ing the drill-spindle and yotherappli,y

ences referred to hereafter, and at the opposite end :t handle, I, is secured to the drivingshzitt G,which passes through the seid bar F, and projects into the casing H, the end of the shaft ,being furnished With ubevel-pinion, m, gearing into a bevel-Wheel, n, which turns in the lower portion of the casing H, und through which passes the drill-spindle K, the luttery having e groove edep ted to e key or feather in the Wheel. The upper end of the drill-spindle is so connected to the lower end ofthe feed-y t screw M that while one een turn independent-k lyof ythe other, the vertical movement of one i must be accompanied by alike movementy of the other. A tubular shet't, N, Which receives the drill-spindle, yis yerrungged to turn freely, but is coniinedvertically within the upper portion ot' the easing H, the upper portion of this tubular shaft forming the :nut for the screw M,

und having, nearits lower end, teeth adapted to e worm, `p, on e spindle, q, which derives its motion from the drivi'ngfsheift G, through the, medium of the cog-gearing shown in Fig. 3, and, consequently, rotates the tubular shaft, end this, through the medium ofthe screw M, feeds the drill-spindle,which een also be raised or lowered, by turning the screw itself, by

ineens of e? hundle,P,`the lutter being prevent f ed from turning by a, pin inserted into a sock-k s et, w, when the automatic yfeeding of the dril f spindle is required.

' yI Gleim as my inventionl. The combination, in a drill-stand, of t post A, its foot a, and a clamping-plate, n hinged to an adj ustaible coller, B, on the post. all substantially es set forth.

2. The combination of the post A. and

clamping-disk D with the tubular drill-ctn'-J ing bar F, and its clamping-diskE, the two disks being secured and otherwise adapt-ed to f eachother, ysubstantially es and for the pur-y 1 pose set forth.

3. The combination of the movable clamping i disk E, the tubular betrv F, and its casing H, thef" driving-shaft G, and drillespindle K, operai fromthe seid shaft, all substantially as spe fied.

4. The combination, substentelly es i scribed, of the disk D, its undercut groove endilunged plug s, with the disk E, and hee ed bolts fu-milj". f

' yIn testimony yWl'ieneoi" I 'have signed 1 name to this specification inthe presence two subscribing Witnesses.

C. VAN HAAGEN f Witnesses WM. A. STEEL, HARRY SMITH. 

